Status Report for the British Virgin Islands - Royal Botanic Gardens ...

Plate 7: Leptocereus quadricostatus
Plate 8: Machaonia woodburyana
Red List Candidates:
(please refer to Appendix 1 for details on EOO and AOO).
In September 2003, exhaustive literature searches at Kew (e.g. in Açevedo-Rodriguez,
Oldfield etc.) and thorough investigation and careful interpretation of the IUCN
guidelines, resulted in the identification of 35 additional Candidate Red List taxa,
bringing the total to 44 putative threatened taxa. Of these candidates, 3 are assessed
here as Critically Endangered (CR), 10 as Endangered (EN) and 22 as Vulnerable
(VU). Many of these are Puerto Rican bank (PRB) endemics whose Extent of
Ocurrence (EOO) cannot be more than 20,000 km 2 as the maximum EOO for this
biogeographic unit (calculated using GIS) is c. 9,570 km 2 . The maximum EOO for
Virgin Island endemics is 810 km 2 . A summary of selected PRB island areas follows
(Table 5).
Island Territory Area (km 2 )
Anegada BVI 41.44
Beef Island BVI 4.64
Cooper Island BVI 1.97
Ginger Island BVI 1.31
Great Camanoe BVI 4.54
Great Thatch BVI 1.71
Great Tobago BVI 1.19
Guana Island BVI 3.93
Jost Van Dyke BVI 9.44
Little Jost Van
Dyke
BVI
1.04
Norman Island BVI 3.57
Peter Island BVI 5.80
Salt Island BVI 1.26
Scrub Island BVI 1.42
Tortola BVI 61.06
Virgin Gorda BVI 25.79
Culebra PR 29.32
- 11 -